Product Description:
Shandong Donghong Pipe Industry Co., Ltd. proudly presents our top-tier polyurethane-foam tubing. Expertly engineered for insulating central heating and domestic-water pipelines, this tubing performs exceptionally in temperatures from -50°C to 135°C. It guarantees superior protection and minimizes heat transfer. Crafted with a robust, rigid structure, it ensures long-lasting durability and safeguards your pipes against potential damage. Furthermore, the tubing's high chemical resistance makes it an ideal choice for a wide range of applications.
Introducing our state-of-the-art rigid polyurethane spray polyethylene wrapped prefabricated direct-buried insulation pipe. By leveraging cutting-edge technology, we achieve remarkable foam density uniformity and consistent insulation layer thickness. This groundbreaking design not only conserves materials but also lowers labor costs, presenting a highly cost-effective solution for hot water transport at temperatures up to 140°C.
| Working Steel Pipe Diameter mm |
Outer Sheath Diameter mm |
Minimum thickness of outer sheath mm |
Insulation layer thickness mm |
| 426 |
494-554 |
4.0 |
30-60 |
| 478 |
547-607 |
4.5 |
30-60 |
| 529 |
598-658 |
4.5 |
30-60 |
| 630 |
700-760 |
5.0 |
30-60 |
| 720 |
790-850 |
5.0 |
30-60 |
| 820 |
891-951 |
5.5 |
30-60 |
| 920 |
992-1052 |
6.0 |
30-60 |
| 1020 |
1093-1153 |
6.5 |
30-60 |
| 1120 |
1194-1254 |
7.0 |
30-60 |
| 1220 |
1316-1436 |
8.0 |
40-100 |
| 1420 |
1538-1678 |
9.0 |
50-120 |
| 1620 |
1760-1880 |
10.0 |
60-120 |
| 1820 |
1960-2080 |
10.0 |
60-120 |
| Note: can be customized as customer's needs. |
Our Ferro-Therm pre-insulated pipes are a marvel of engineering, exhibiting unparalleled uniformity in core indicators such as thickness, density, thermal conductivity, closed cell rate, and water absorption. This meticulous attention to detail ensures exceptional overall stability and performance.
Engineered with precision, these pipes feature minimal axis eccentricity and low thermal conductivity. These characteristics deliver superior heat preservation, making them a highly efficient choice for your thermal management needs.
Our pipes are enhanced with online polyurethane spraying that boasts high reactivity. This ensures an exceptional bond between the steel core and the outer protective layer. The insulation remains steadfast against temperature fluctuations, eliminating the risk of delamination.
The insulation layer is crafted with meticulous precision, featuring a flat surface and minimal thickness deviation. Its wide adjustment range guarantees precise application, ensuring optimal performance every time.
Utilizing our innovative polyethylene winding method, the outer protective layer boasts thin, uniform walls with low shrinkage and minimal deformation. This technique significantly enhances mechanical properties and effectively resolves any cracking issues.
Our cost-effective design ingeniously reduces the thickness of the polyethylene outer protective layer while maintaining superior insulation performance. This approach minimizes deformation and stress, leading to substantial cost savings without compromising quality.
Shandong Donghong Pipe Industry Co., Ltd. proudly introduces an advanced piping solution, distinguished by the following exceptional features:
1. Our innovative design eliminates the need for support, significantly reducing heat loss and completely removing the 'support thermal bridge' effect, thereby ensuring maximum thermal efficiency.
2. Featuring remarkable strength and superior toughness, our pipes are effortlessly weldable, simplifying construction and enhancing convenience.
3. With impressive low thermal conductivity, exceptional waterproof capabilities, and strong corrosion resistance, these pipes are perfect for direct burial in both soil and aquatic environments.
4. Installation is made simple with straightforward connection methods, including flanges or quick joints, ensuring a hassle-free setup.
5. Designed for longevity, our pipes are engineered to withstand temperatures ranging from -20ºC to 120ºC, ensuring a durable service life of over 30 years.
- At Shandong Donghong Pipe Industry Co., Ltd., our products adhere to global standards such as CE, BV, ISO, and Wars certifications, continually surpassing these criteria. Should you have specific national standards, please inform us, and we will rigorously test our products to meet or exceed them.
- As a full-service manufacturing firm, we provide a wide array of pipe products, fittings, packaging, and shipping services. Our expertise also encompasses project consulting, tailored pipe system solutions, and design guidance. We offer comprehensive pipeline contractor services, pipe repair, and complimentary maintenance advice, emphasizing strong engineering support.
- We are proud to offer OEM/ODM services, enabling customization in materials, specifications, logos, packaging, connection methods, and more. Our seasoned team delivers bespoke solutions for your unique projects, drawing on our vast experience from numerous successful undertakings.
- We provide flexible payment terms, including T/T or L/C at sight. Ensuring quality is our utmost priority; we welcome customers to personally inspect our products. We conduct rigorous tests based on customer specifications before orders and offer samples for testing prior to bulk production.
The Classic Project Cases
Qingdao Haiyang 4.5 Million Square Meters Nuclear Energy Heating Project As China's pioneering nuclear energy heating initiative, this exemplary project leverages Shandong Donghong Pipe Industry Co., Ltd.'s state-of-the-art spray-wound pre-direct buried thermal insulation pipes. These advanced pipes, with their uniform density and energy-efficient properties, significantly boost heating transmission efficiency, marking a revolutionary advancement in eco-friendly construction solutions.
Qingdao West Coast Heating Pipeline Network Project
Backed by a substantial investment of 217 million yuan from the Qingdao West Coast Public Utilities Group, this ambitious project originates from the Qingdao Special Steel heating first station. The 8.2-kilometer heating pipeline traverses the east bank of the Henghe River and the north side of Binhai Avenue, connecting with the Huaneng long-distance heating pipeline at the Hong Kong Run Avenue Interchange. By integrating industrial park waste heat, industrial waste heat, and clean energy sources, the project utilizes Donghong's DN1400-DN1200 spray-wound pre-direct burial insulation pipes, establishing a new benchmark in energy conservation and efficiency.
Welcome to Shandong Donghong Pipe Industry Co., Ltd.
Shandong Donghong Pipe Industry Co., Ltd. (referred to as Donghong Co., Ltd., stock code: 603856) is a premier engineering pipeline manufacturer, strategically located in Qufu, China - the revered hometown of Confucius. Our expertise lies in designing and delivering tailor-made pipelines for a wide array of applications, including specialized pipelines for rainwater and sewage diversion, municipal infrastructures, industrial and mining sectors, and significant national engineering projects.
Our company has meticulously crafted a comprehensive industrial ecosystem that includes design institutes, financial institutions, port logistics, construction units, and an array of pivotal stakeholders. We are devoted to revolutionizing human life through advanced intelligent pipelines and ensuring the utmost safety in pipeline transportation.
Shandong Donghong Pipe Industry Co., Ltd. proudly stands at the vanguard of innovation with a remarkable team of over 200 R&D experts and an impressive portfolio of more than 100 patents. By harnessing esteemed national technology R&D platforms like the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong is pioneering the realms of digitalization, informatization, and intelligentization in pipeline engineering.
Our company spearheads the advancement of the engineering pipeline industry, actively engaging in pivotal national strategic projects and essential livelihood initiatives. These include the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road, 'Two Clear and One Tip', standardized farmland, urban and rural water supply integration, Liren gas, and centralized heat supply.
1. Does your product comply with international standards?
Our products have not only met but surpassed the stringent requirements of CE, BV, ISO, and WARS certifications, showcasing exceptional performance metrics. If you have a specific national standard in mind, please let us know, and we will either confirm compliance or conduct the necessary tests to meet your needs.
2. What types of services do you provide?
As a versatile manufacturing factory, we offer an extensive range of pipe products, fittings, packaging, and comprehensive shipping services. In our role as a professional consulting firm, we provide expert project advice, innovative pipe system solutions, and meticulous design recommendations. Moreover, as a dedicated engineering enterprise, we specialize in pipeline contracting and repair services, complemented by free maintenance guidance to ensure your systems operate seamlessly.
3. Do you offer OEM/ODM services?
Absolutely, we excel in providing customized solutions tailored to your needs, including materials, specifications, branding, packaging, and connection methods. Our seasoned team is adept at crafting unique solutions for specific projects, boasting a portfolio of numerous successful implementations.
4. What are your payment terms?
We offer flexible payment terms, accepting both T/T and L/C at sight, to facilitate smooth transactions.
5. How do you ensure the quality of your products?
We warmly welcome customers to visit our facilities and personally inspect our products. We perform comprehensive, stringent testing tailored to customer requirements before any order is finalized. Additionally, we can provide samples for customer testing to ensure product compliance and satisfaction before proceeding with mass production.
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